<template>
	<view class="content">
		<scroll-view scroll-y class="left-aside">
			<view v-for="item in flist" :key="item.layer" class="f-item b-b" :class="{active: item.layer === currentId}" @click="tabtap(item)">
				{{item.name}}
			</view>
		</scroll-view>
		<scroll-view scroll-with-animation scroll-y class="right-aside" @scroll="asideScroll" :scroll-top="tabScrollTop">
			<view v-for="item in slist" :key="item.layer" class="s-list" :id="'main-'+item.layer">
				<text class="s-item">{{item.name}}</text>
				<view class="t-list">
					<view @click="navToList(item.layer, titem.layer)" v-if="titem.glid === item.layer" class="t-item" v-for="titem in tlist"
					 :key="titem.layer">
						<image :src="titem.picture"></image>
						<text>{{titem.name}}</text>
					</view>
				</view>
			</view>
		</scroll-view>
	</view>
</template>

<script>
	import {
		ShopService
	} from '../../http/service/ShopService.js'
	import FuctionBase from 'zpub_plugin/plugin/FuctionBase.js'
	import {
		InitSvrMethod
	} from "zpub_db/method/InitSvrMethod.js"
	import {
		JsonUtil
	} from 'zpub_bas/util/JsonUtil.js'
	import {
		FunctionFactory
	} from 'zpub_bas/solt/factory/FunctionFactory.js'
	import {
		RouterMethod
	} from 'zpub_uni/method/RouterMethod.js'
	/** 插件 - 首页插件 注意PluginBase插件导入*****  */

	/**
	 * 使用说明:
	 */

	/**
	 * data属性说明：
	 * @data {类型=Array}  [carouselList=banner图] 
	 * @data {类型=Array}  [zkList=折扣图] 
	 * @data {类型=Array}  [cate=分类] 
	 * @data {类型=Array}  [seckill=秒杀] 
	 * @data {类型=Array}  [shopGroup=团购] 
	 * @data {类型=Array}  [categoryList=分类精选] 
	 * @data {类型=Array}  [bgList=背景精选择] 
	 * @data {类型=Array}  [bgList2=背景精选择] 
	 * @data {类型=Array}  [loveList=猜你喜欢] 
	 */
	export default {
		mixins: [FuctionBase],
		data() {
			return {
				sizeCalcState: false,
				tabScrollTop: 0,
				currentId: 1,
				flist: [],
				slist: [],
				tlist: [],
				pushStack: false
			}
		},
		onLoad() {
			this.loadData();
		},
		methods: {
			async loadData() {
				let list = InitSvrMethod.mInitSvr.cate.filter(item => item.type == 1);
				list.forEach(item => {
					if (!item.glid) {
						this.flist.push(item); //pid为父级id, 没有pid或者pid=0是一级分类
					} else if (!item.picture) {
						this.slist.push(item); //没有图的是2级分类
					} else {
						this.tlist.push(item); //3级分类
					}
				})
			},
			//一级分类点击
			tabtap(item) {
				if (!this.sizeCalcState) {
					this.calcSize();
				}

				this.currentId = item.layer;
				let index = this.slist.findIndex(sitem => sitem.glid === item.layer);
				console.log(this.slist[index]);
				this.tabScrollTop = this.slist[index].top;
			},
			//右侧栏滚动
			asideScroll(e) {
				if (!this.sizeCalcState) {
					this.calcSize();
				}
				let scrollTop = e.detail.scrollTop;
				let tabs = this.slist.filter(item => item.top <= scrollTop).reverse();
				if (tabs.length > 0) {
					this.currentId = tabs[0].glid;
				}
			},
			//计算右侧栏每个tab的高度等信息
			calcSize() {
				let h = 0;
				this.slist.forEach(item => {
					let view = uni.createSelectorQuery().select("#main-" + item.layer);
					view.fields({
						size: true
					}, data => {
						item.top = h;
						h += data.height;
						item.bottom = h;
					}).exec();
				})
				this.sizeCalcState = true;
			},
			navToList(sid, tid) {
				uni.navigateTo({
					url: `/pages/product/list?fid=${this.currentId}&sid=${sid}&tid=${tid}`
				})
			}
		}
	}
</script>

<style lang='scss'>
	page,
	.content {
		height: 100%;
		background-color: #f8f8f8;
	}

	.content {
		display: flex;
	}

	.left-aside {
		flex-shrink: 0;
		width: 200upx;
		height: 100%;
		background-color: #fff;
	}

	.f-item {
		display: flex;
		align-items: center;
		justify-content: center;
		width: 100%;
		height: 100upx;
		font-size: 28upx;
		color: $font-color-base;
		position: relative;

		&.active {
			color: $base-color;
			background: #f8f8f8;

			&:before {
				content: '';
				position: absolute;
				left: 0;
				top: 50%;
				transform: translateY(-50%);
				height: 36upx;
				width: 8upx;
				background-color: $base-color;
				border-radius: 0 4px 4px 0;
				opacity: .8;
			}
		}
	}

	.right-aside {
		flex: 1;
		overflow: hidden;
		padding-left: 20upx;
	}

	.s-item {
		display: flex;
		align-items: center;
		height: 70upx;
		padding-top: 8upx;
		font-size: 28upx;
		color: $font-color-dark;
	}

	.t-list {
		display: flex;
		flex-wrap: wrap;
		width: 100%;
		background: #fff;
		padding-top: 12upx;

		&:after {
			content: '';
			flex: 99;
			height: 0;
		}
	}

	.t-item {
		flex-shrink: 0;
		display: flex;
		justify-content: center;
		align-items: center;
		flex-direction: column;
		width: 176upx;
		font-size: 26upx;
		color: #666;
		padding-bottom: 20upx;

		image {
			width: 140upx;
			height: 140upx;
		}
	}
</style>
